Relay for undulatory currents.



E. M. C. TIGEHSTEDT.

RELAY FOR UNDULATORY cummns.

APPLICATION FILED OCT. 19. 1916.

1,212,163, Patented Jan. 9,1917.

m0 cmsm TIGBS'IEDT, OI cormmaalm'n mar roa mmronr Specification of tmm Patent.

Patented Jan. 9, 1917.

Application fled October 19, 1910. lel'lll I0. 180,581.

electrlc conductivity effected by the ionizer takes place by means of a grateor sievelike auxiliary electrode.

According to the invention the various electrodes are arranged interposed in one another and for this reason they are appropriately given a cylindrical shape. This arrangement of the electrodes entails two important advantages. On one hand the electrodes may be made as large as desired as the distance between the electrodes may be likewise consisting made uniform all over, whereby of course a considerable augmentation of the effect is made possible, and on the other hand the rays owin to their radial movements may be less un avorably affected by outer magnetic and electric influences. This favorab effect may be further augmented if the relay be surrounded by a cylinder of soft iron or the like in which the vagrant lines of force are made uninjurious. The drawizigI annexed shows by way of example a m 'fication of the relay according to the invention. I

The ray-relay a comprises thecathodeb of a helically wound wire to which is led current for heating from a source of current 0 over'a regulating rheostat d. The anode e of helically'wound wire is over the primary winding f of an induction coil connected with the ositive pole of the battery 0 while the secon ry wmding of this collis connected with a tele hone A grate-shaped auxiliary ra between the anode elect e 5 aris 1 ewise cylinder-shaped and fiB over the secondary win andaregulatmg k of an induction e011 eostat 1 connected with and the cathode one terminal of the cathode b, while the circuit is closed tbrou h the air-space between the cathode b and t e auxiliary electrode 1'. The primary winding n belonging to the secondary winding k is arranged in the circuit of a micro hone o. The relay is surrounded by a cy inder p of soft iron the ends of which are closed by covers 1- and in one of the said covers is found an opening a through which the relay can be watched during its working. The current variations in the primary winding n incurred by the microphone o are transmitted to the secondary winding is and the circuit of the auxilia electrode i, so that the resistance between the latter and the cathode is thereby altered. Thereby the resistance of the dis-.

charging tube is altered in well known man.- ner an the variations in the microphone circuit are transmitted to the primary current of the telephone circuit passing.

through the dischar tube.

Hav' thus fulfi' escribed my invention, I aim as new and desire to secure by Letters .Patent in U. S. A'.:

. 1. A relay for undulatory currents comprising an airtightly closed evacuated container, an anode mounted therein, a perforated auxiliary electrode arranged inside the.

said'anode, a cathode arranged inside the said auxiliary electrode and ada ted to be heated b an electric current an cally an electrically conducting means surrounding said container.

2. A relay for undulatory currents com prising an airtightly closed evacuated container, an anode mounted therein, a perforated auxiliary electrode arranged inside the said anode, a cathode arranged inside the said auxiliary electrode and adapted to be heated by an electric current an a mantle consisting of a magnetically and electrically conducting substance surrounding the said container.

In testimony whereof, I aflix my signature in presence of two witn 7 mo 0m 'HGIRBI'IM.

Witn:

Vmeo Bnou, .Gunn Dan.

magneti- 

